In the anime

Only one Magma Admin, Tabitha, ever appeared in the anime. He made his debut along with Aqua Admin Shelly in A Three-Team Scheme, where he was mistakenly referred to as "Field Commander Harlan"; this was corrected in subsequent episodes. He led a squad on a mission to Dewford Island to find the Cave of Origin. It was revealed that he was carrying the Blue Orb (mistakenly referred to as the "Indigo Orb") with him at the time, though it was never shown onscreen.

In the manga

In the Pokémon Adventures manga

There are three admins of Team Magma known collectively as the Three Fires (Japanese: 三頭火Three Head Fires). Courtney and Tabitha are directly based on their game counterparts while Blaise is exclusive to Pokémon Adventures. They collectively serve as the second-in-commands to Maxie.

The members of the Three Fires has a special memory-recording lighter in the horns of their outfits than can burn the memories of its holder onto paper. The three lighters can also link up and mix their memory data with each other. Each member also utilizes a different aspect of fire, with Tabitha using smoke to incapacitate opponents, Courtney using flames to create fires and Blaise using heat to cause his opponents to hallucinate.

Blaise returns to Team Aqua's Lilycove Headquarters and unexpectedly encounters Amber. The manga-exclusive counterparts eventually strike a deal to work together, and force Hoopa to summon Kyogre and Groudon, so that they would be able to trace their respective leaders' whereabouts. It is then revealed that "Courtney" and "Tabitha" were merely codenames for the game-based Magma Admins; two characters based on Courtney and Tabitha in Pokémon Omega Ruby and Alpha Sapphire were introduced as co-operators with Zinnia.